Research Article
Temporal Description of Annual Temperature and Rainfall in the Bawku Area of Ghana
| SPI results | Interpretation | Probability of occurrence | Severity of event |
| ≥2.0 | Extremely wet | 2.3 | 1 in 50 years | 1.5 to 1.99 | Very wet | 4.4 | 1 in 20 years | 1.0 to 1.49 | Moderately wet | 9.2 | 1 in 10 years | 0.0 to 0.99 | Mildly wet (NN) | 34.1 | 1 in 03 years | 0.0 to −0.99 | Mildly dry (NN) | 34.1 | 1 in 03 years | −1.0 to −1.49 | Moderately dry | 9.2 | 1 in 10 years | −1.5 to −1.99 | Very dry | 4.4 | 1 in 20 years | ≤−2.0 and less | Extremely dry | 2.3 | 1 in 50 years |
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NB: “NN” means near normal. Source: [ 39, 42]. |